I have specific ringtones for specific people on my phone (like the Soprano's theme for my family), but my general ringtone is Michigan's fight song, the Victors.
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For baseball/basketball/hockey, I'm a homer, so I like the Phillies, 76ers, and Flyers.
For football, I started out an Eagles fan, but they were pretty crappy in the early post-Super Bowl '80's. SB XIX (Dolphins/49ers)